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dm verity: set DM_TARGET_IMMUTABLE feature flag
commit4caae58406
upstream. The device-mapper framework provides a mechanism to mark targets as immutable (and hence fail table reloads that try to change the target type). Add the DM_TARGET_IMMUTABLE flag to the dm-verity target's feature flags to prevent switching the verity target with a different target type. Fixes:a4ffc15219
("dm: add verity target") Cc: stable@vger.kernel.org Signed-off-by: Sarthak Kukreti <sarthakkukreti@google.com> Reviewed-by: Kees Cook <keescook@chromium.org> Signed-off-by: Mike Snitzer <snitzer@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -1312,6 +1312,7 @@ static int verity_ctr(struct dm_target *ti, unsigned argc, char **argv)
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static struct target_type verity_target = {
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.name = "verity",
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.features = DM_TARGET_IMMUTABLE,
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.version = {1, 8, 0},
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.module = THIS_MODULE,
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.ctr = verity_ctr,
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